Machine for knotting springs



F. G. FENCL MACHINE FOR KNOTTING SPRINGS Fild July 5. 1927 2 Sheets-Sheet 1 Dec. 6, 192-1.- 1,651,518

F. G. FENCL IACHINE FOR KNOTTING- SPRINGS Filed July 5. 1927 2 sheets-sheet 2 INVENTOR. I

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Patented Dec. 6, 1927.

I FRANK G. FEIIOL, or. OAKLAND, oAtmoimm;

' MACHINE non KNOTTING, SPRINQSJ Application filed J'1 11y 5,

This invention relates to an intermittent gear drive, one use ofjwhjich; is in connection with a: spring knotting machine. I Thisjpar-i, d "or; both. around tioular object ist'o jknot one; en ends of a spiral bed} or seat" spri the adjacent member of; the spi ii each end of the bed' o'r' seat spring'fot a given diameter. The present invention relates to the intermittent drive-for actuating the spring holder-and theftWisting device for twisting the ends ofthe. Wirearoundthe next adjacent member of the ,spirali Another object ofthe invention is topro vide a driving device which will start the apparatus into motioi ironra slidablekey and fixed pin thereby permitting" the gears for operating the twister gearto remain al- Ways'in mesh, and in thatfway prevent the gear breakages'which happen very frequent- 1y with the ordinary types of starting mechanismsof this character.

'Another objectof'theinvention is to pro vide means for stopping the individually and separately moving parts of the apparatus in a given position withfrespect to each other at the end ofeach movement.

Another object of theinvention is to enable the apparatus tobe rotated reversely by hand whenever ithappens that a spring gets stuck in the f twistinggea-r.

Another'ob ect of the nvention 1s to pro vide a drivinginechan sm for a gear movement which isyaplplioable to. any apparatus where oneor'mjore gears are tolbe intermite tently operated asin' a punch press, a shear; or any other mechanism otthatcharacter:

Other obj ects of" the invention willbe apparent as the description proceeds; V

An embodiment of the invention is shown: in the accompanying drawings in which the same referencefnum era'lf is applied tofthe same portion throughout the several, figures f he'f ra g and; of which h r imay be modification.

I "Figure 1 1s a -plftil view of, aipojrtioniof the driving; assembly ith partsfcutf away forpurposes of illustration) 7 o v 'E g u t s, a, plan v ew? 9t, h Q Q a ilfq der Pmwde a const u t which. W111 have 1 vations and 1927; s riai'iw 203,422.

spiral 'of j a bed 0r seat spring illustrating hefp qduct produedjby this apparatu /l *'g re" is an v nidiview jo'fi he." dr ving mechanism sh'own'inlFigure'l; 1 f

Figure 4" is; a vertic sectional, View, ofthedriving apparatusshown 'nj Figurigl.

Figure 5 is an end viewioff'tlie fdriving collar. p Figures 6', 7 and 8; respectively, are aside elevati'oinplan and end view of 'j one. ofl the slidable keys used in the driving apparatus Figures 9 andilO" are respectivelygside ele I end View ofthe rcenteringj stop' for the gear,

Figures 11 and 12 are respectively a plan view and side elevation of the cam for -n 1 oy'- ing the'slida'ble keysl V Figure 13 is aview in end elevation of: the driving 1 gear; tliejf drivingQc'a'mQ and the; twister gear, showing the spring holding table in position ready ;to holtlfa" spring. I This apparatusis intended; for; t'he'piirpose; of intermittently driving'a' Wire coiling-gear; the objectof which is to producethetwist A at one endeoffa spjiralflbedffor set'spring B (see, Fig 2) and the principal object of the invention is to produce .ajdevicein'whioh the gears alwaysremain ingmesh so as't'o prevent the breakage ofindividualteeth and to produce a stronger apparatus; capable 0t starting" with less shock to the st'artfinggappa ratus', and the invention in}. this {case lies v in' the startingapparatus and not particularly in the coiling apparatuis," which coiling a paratus is in: usein anumber ofldifliere ittwire; coilingmachineso flthis kiildl. t

Thqmr eral'1l fi Xe l5 p1an'elevation 1njEi 1ubleshaft r111 shaitisgpnolrfif or any[suitablejmechanismj not? forming eipantli of this inv-n ionfivhichistarts it;an diturilsit once manger; releases it; f a ll, of th some;

steps ofthe;p1esent inv on' lieing ccom: phshed'byt eauto nat mechanism sdfwinsfli.

' The siisaii cam secured; thereto, whichlcani has a track to; receiy s roller "5; s ilt r ler being secured; to arm eyjby *we iseaseswe gearing shownin 7 arm 6 is really a hell crank, and has the depending arm 9 pivotally mounted to a tired frame at 10. This arm is provided. with a table 11. and with a grooved holder 12 to receive the wire coil, said holder 1.2 having a pivotally mounted body 13 carried by the pin 1 which body is pulled down against the holder 12 by means of a l'ixed roller 15, said roller being shown in dotted lines merely for purposes of illustration, and

to bring the body 13 down against the coil wire to hold it in a fixed position in the slotted twister gear 16, while the twist A is being made, said twistnsuallv consisting of one or two turns at the end of the coil.

The slotted twister 16 is driven by the auxiliary gear 16, which is in mesh with said twister and with the main drive gear 17. The relation of the driving gear 1? to the twister gear 16 issueh that the precise movement of the twister gear will be attained on each driving operation. 1

The driving gear 17 has a hub 18 connect ed thereto, which hub is journalled in the bearings. The ring 19 holds the two keys 20 and 21 in the position shown in Figure 4, while spiral springs 23 and 2s hold said keys resiliently to the right Figure 4, except when compressed by the movement of" the curved cam 25, whichcam is secured to the inside of thebearing 3 by means of two bolts 27 and 28. The ring 19 is held in place by two set screws 19.

Secured in a drill hole in the bearing 3 is a latch 30, said latch being normally held in the position shown in Figure l by means of the spiral spring 31, the latter being held in plu 32. y y, i

keyed to the shaft 2 is the collar 33, said collar having two driving pins3+land 35 pro jecting therefron'i and against which the ends of the keys 20 and 21 bear during the course of movement of the apparatus.

The operation of the apparatus is as follows: Assuming the shaft 2 to be started for a single revolution byany suitable mechanism, the first thing that will occur will be for the cam 4: to draw the table I 1. toward the twister gear 16, this will bring the coil into the twister gear where it will remain during the remainder of the n'uivcnn nl o l' the apparatus while producing the knot A. When brought up to the eenter of lhe liu'ii-zlicr gear the next movement will he for one oi the sliding keys, 3st or 35 to engage one o the pins 20 or 21. with the result that the gear 17 will be started into motion and continued in motion for one-half of a turn whereupon the cam 25will disengage whichever hey or 21 is engaged with one of thepins of the collar 33 and permit the gear 17 to stop. the latch 31 holding it in a given stopped position. At the, time the gem- 17 stops the slotted gear 16' will be restored to the place by means of the threaded position shown in Figure 1.3, and the cam al will then have pushed the table 11 back to the position shown in Figure 13 so that the knotted wire and coil can be removed from the machine and the. mzmhine then ready for another op ration.

ll a spring happens lo get slurlt in the twister gear from any cause, the pin em ables either oil? the keys 20 or 21 to reversely drive the twister gear enough to disengage the tu'istedwire ends. a

It will be understood that the number of turns of the twister made during any revolution of the gear 17 may be varied by changing the number of teeth on the gear, by

changing the length of the cam :25, by using more keys 20, or by using more stops 34:,and 3 5. In any of these events the depressions in the driving gear in which the pin 31 acts must be changed accordingly so that the driving gear will be stopped in whatever location may be desired. \Vhile this mechanical movement has been described inconnection with a knotting device for springs it is to be especially noted that there are many uses for it and that the intermittent oper' tion of the gear 16is only one of many uses to which it may he put.

Having thus described my invention, what I desire to secure by Letters Patent of the United States is as followsbut modifications may be made in carrying out the invention as shown in the drawings and in the above particularly described form thereof, within the purview of the annexed claims.

1. An intermittent driving mechanism for spring knotting machines comprising a sleeve, a di" ing shaft tliQ10f0I,l collar fixed on said shaft, and means carried by the colin r to pick up the sleeve and turn it one-half a revolution each time lhe driving shaft is turned one revolution. l i

2. Aninlermittent driving mechanism for wire knotting machines comprising a driv-, ing shat't, a cam for bringing the \virein position, a slotted wire knotting gear, a sleeve carrying a continuous gear, means whereby said sleeve will hedrivcn one-half a revolulionfand means to automatically cngagcand d isengage sa d sleeve and gear cueh time the driviinr shaltis turned one complelc revolulion. l

3. A lniolting mochan sn'l tor springs, a driving shaft, a sprn'ig holding device. a, slotted gear, a cam for bringing the spring lnilding device into the slotted gear, loosely mounted gea r on the driving shaflgva fixed collar carried by the driving shaft, and a pair of slidable keys in said hub for driving said gear from said collar one half a revolution each time the driving shaft is turned ill!) one complete revolution, and meansto autot. an apparatus of the class described coin Jrisin a drivin shaft a Wire coil slidable keys for turning the main gear onehalf a revolution, a fixed cam for disengaging said keys from the driving mechanism alternately, and means to stop the main gear in a fixed position each one-half revolution.

5. In a machine of the class described a drive shaft, a fixed bearing therefor, a collar on said shaft, two stops on the collar, a

cam on the drive shaft, a Work holder operated by the cam, a tool for operating on the work, a drive gear, and means to operate said tool as well as to stop the same after a given part revolution of said drive gear.

In testimony whereof I have hereunto set 20 my hand this 28th day of June, A. 111927.

FRANK G. FENCL. 

